fournier



Feb. 21, 1956 E. E. FOURNIER CARD CLOTHING Filed June 4, 1954 FIG.|

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INVENTOR EDMOND E. FOURNIER ATTORNEY United ates Patent CARD CLOTHING Edmond E. Fournier, Worcester, Mass. Application June 4, 1954, Serial No. 434,403

1 Claim. (Cl. 19-114) This invention relates to card clothing for carding fibrous material such as cotton, wool, rayon, nylon, etc. or any other materials which require the carding process in the textile arts.

Card clothing consists of a foundation which is a strong strip, usually of woven material and of a sutficient thickness to hold the wire teeth of the card clothing. It has been a difficulty heretofore that these wire teeth are rather easily dislodged from the foundation and the card clothing has to be re-processed to reposition the points in the desired locations. The present invention has for its main object the provision of card clothing in which the wire teeth are so constructed and located as to be self-setting in the event of being pushed back partially out of the foundation.

Another difficulty has been that the wire teeth, in the form of staples, have to be located at an angle to the foundation, and when working or being ground, the pressure on the points causes them to be retracted partially under the foundation. This shortens the lengths of the teeth and prevents the required carding operation from being done with best efficiency. The. present invention avoids this and maintains the tooth points at a level, correctly operating position.

Continued working of the teeth as above described causes the formation of slots or elongations of the tooth holding apertures in the foundation, so that the wire staples or teeth are not properly laterally supported; and also in carding synthetic fibers, a greater pitch or angle has to be provided for proper operation, and this in turn makes the difficulties above described occur with greater rapidity and to a greater extent, and the present invention provides a construction for preventing such difficulties.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. l is a top plan view of a strip of card clothing according to the present invention;

Fig. 2 is a sectional view through the same;

Fig. 3 is a rear face or bottom plan view of the card clothing;

Fig. 4 is a view in section through the foundation and showing of a single tooth;

Fig. 5 is a view of the single tooth, looking in the direction of arrow 5 in Fig. 4; and

Fig. 6 illustrates the new card clothing in operation on carding cylinders.

In the drawing, the reference numeral 10 indicates the foundation of a strip of card clothing in general, and the reference numeral 11 represents the points of the teeth lodged in the foundation. These points perform the carding operation, see Figs. 6 and 7.

Referring to Figs. 2 to 4-, it will be seen that the individual points 11 are joined by crowns 12 as usual and that in fact each pair of points is in the form of a staple, with the crown lodged firmly against the under surface of the card clothing foundation 10 and with the points v projecting well beyond the opposite surface thereof.

Card clothing teeth are ordinarily provided with angles forming the knees 13 for proper carding operation, and in modern practice, the angle formed by the'knees is increased in order to provide better operation for instance on synthetics. These knees may be located as shown or at any other point above the top surface of the card clothing foundation. 7

Between the crowns 12 and the knees 13-,fthe novel card clothing teeth are provided with bendswhich are indicated at 14. As shown, these bends provide straight portions 15 which are located generally at right angles to the length of the foundation 10, and then the portions between bends 14 and knees 13, are slanted or inclined runs which are indicated in the drawing at 17. These of course also penetrate the foundation and then protrude to appear at the top surface thereof.

With the straight portions 15 extending directly into the foundation from the under surface thereof and the angular portions 17 also being located in the foundation as shown, it will be clear that when operating, forces are applied to the points 11, such forces proceeding relatively with respect to the foundation to the right in Fig. 2. This causes the teeth to have a tendency to bend toward the rear, and the sections 17 thereof have forces applied thereto so that the sections or runs 17 act in the manner of levers.

In Fig. 2, this levering pressure will act in a clockwise manner and thus tend to lift the crown 12 and the parts 15 below the bands 14 into firmer contact with the under side of the foundation 10. This prevents working of the staples in the foundation and also prevents elongation or the formation of slots in the foundation. Thus the bends 14 provide a much longer-lasting and correctly positioned tooth which does not tend to work toward the rear or under face of the foundation. This tendency in the conventional tooth is illustrated by the left-handmost staple in Fig. 2. If the part 15 and bend 14 were absent, the parts 17 could move rectilinearly downwardly, but the present construction prevents this action.

On the other hand, the bend 14 and its intimate contact with the foundation 10 provides that if the individual teeth or staples should became positioned as shown at the lefthand in Fig. 2, the material of the foundation will force the teeth back into original position again, this action being automatic.

It will be seen that if a prior art staple without bend 14 should be pushed toward the rear face of the foundation, the motion is straight-line and there is no opposition to such motion. On the distinct contrary, however, a motion of the novel staples downwardly in Fig. 2 results in pressure being applied by the material of the foundation itself against the vertical portions 15 at the left-hand sides thereof as seen in Fig. 2, and this force resists the working down of the teeth. If the teeth are mechanically forced down, then this pressure moves them back up again to the original correct position thereof.

The present invention provides for staples or teeth which are locked in position on the foundation and even if they work down to some extent, they will be repositioned automatically as above described due to the presence of the bends 14, the straight portions 15 between the crown 12 and the bends 14, and the lengths 17 which form an angle with the parts 15.

This action is graphically illustrated in Fig. 6 where'- in the cylinders are indicated by the reference numeral 18 and it will be seen that the teeth or staples absorb a great deal of punishment, but that those of the present invention will remain at the correct location for longer and more satisfactory service, and will not work to the rear Patented Feb. 21, 's

ass is the =case, with:prior art: teeth. Also; the pitcli or angulzirity ofbendlBmay be made as required and canbe muehgreaterr-arud"thepins"can'"be"nratleflon'ger than those of the prior art consequent improvement in the carding of synthetics. Also, .the present invention delays EcrYSta'l'l'iZation" ofth e tthiti a degree not fu-ndi in the"priotartf- Having thus" ds'cribbdrnY invention" andlthe adfiaix tages thereof; I doinorwish to belimiidto the details. he'reindisclosed, otherwise thanzas set forth iii-rifle claim, bur'whatirctaim is z I Card clothing comprisinga foundation and'a; plurality f ofteth therein; eacli'tooth ha'viriga po'rtion eml:-eddd.in' the foundation and an exposed portiofextendi'ri'gffomla surface thereof, theembeddd' portionsiof tlieteeth each -comprising- 'a pair of relatively an'gularly dis pesed runs;

one embedded run being located at an incline to the fonrrdation arrd protruding through the same at"sa'i'd"sur= References Cited. inthefile of this patent FOREIGN PATENTS 22,741 Great Britain 1892 88,129 Germany Aug. 14; 1896 605,236 France- May 21, 1926 

